I would get with support. Something is not right. Let them sort it from the log files. Hopefully it’s just a bad pcb.
It is good to see a decent print tho. 
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It’s only cost me about $100 bucks worth of filament and 2+ weeks… 
Received the following error tonight:
HMS_0300_0200_0001_0003 The nozzle temperature is abnormal, the heater is over temperature.
I was running another flow test at 280 degC and it happened at about 25ish mm3/s. I guess the heater couldn’t keep up? Rebooted and the error went away but now I don’t feel very confident in this machine at all. I think I got a lemon.
First suggestion is to change to a 0.4 nozzle. I’ve seen comments that bambu recommends a 0.6 for CF filaments? No idea why, I’ve printed plenty of CF PLA & PETG with 0.4. Yes, a bigger nozzle will give more room for the CF to pass through but in my experience, 0.4 does not pose a restriction.
Second, are you trying to print that spiral without supports? That’s a tough ask even for standard PLA, let alone PETG and even harder to get right with CF.
IMO, the Bambu part cooling fan can’t keep up with very high flow rates. 0.6 requires a higher flow and PETG requires higher temperatures. It just can’t bridge well when asked to do both and at high speeds.
Lastly, I don’t have Bambu CF filament, so I am using the generic filament settings, with no changes. I use everything from eSun to the cheapest CF I can find on Ali and it all prints well.
This kind of thing is why I’ve started running the Orca-Slicer calibrations on all new filaments. It takes a little time, and a little bit of filament, but then the setting produced by the calibration is the number that works best on my machine, regardless of whether it is the “true” number. Sometimes the number matches the Bambu or filament manufacturer recommendations, sometimes it is quite different.
Saves a lot of time and filament wasted on guesswork and bad prints.
Yea, I started with the 0.4mm nozzle and Bambu asked me to switch to a 0.6mm so that’s what I tried. I’m having problems no matter which nozzle I use. It seems like the part cooling fan is not strong enough and the nozzle temp is too cold. Odd combo of problems resulting in strange results. Maybe I’m wrong but something is not right for sure.
Yea, I’ve actually ran through that as well. Just didn’t really seem to help… wish I could say otherwise.
I wanted to give an update… I received my replacement printer last night and set it up. I ran the pre-sliced benchy and I ran a benchy I sliced in Bambu Studio using all defaults for Bambu Basic PLA (actual PLA is Bambu basic PLA - Red). Both parts turned out very good and I’m now a happy camper. The only difference from my original tests is red vs silver. I actually have some silver left (not much) and I’m about to run the test again with it and see what happens. So far so good.
One more update… I ran the silver pla and it did have a bit of an issue but not bad and I believe if I would have rotated the part by 180 so the front was pointed towards the fan. All in all I am very happy with the performance so far!
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I am having an issue where the print does not print nice with higher infill, this one was printed at 75% but it does this at 100 also. prints smaller prints with less infill pretty nicely.
I might be mentally challenged because it says i cant imbed media items in a post
@JAB probably best to start a new topic. And I believe you have to reach a certain level before you can post images and links etc.
WOW - they replaced it ? I realise this is bit of a Nekro to the post - but great news.
I hope my chattering toolhead\carbon rail issue is eventually resovled, I love my printer , printing everyday to try and improve it, but yeah it does hurt to part with so much $$ and see differences others dont have.
Yep, they did the right thing and I’m still very happy with my printer!